Are you asking if there are good careers (jobs) in Unix? Unix is still the
Workhorse Operating system for large scientific and business computers,
especially IBM, HP, and Sun.
Just about everything you learn in Unix is likewise applicable, theory-wise,
to Linux, *BSD, and Mac OS.
Learning Unix is good for you, and your career.
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Keep up with the latest trends: http://www.AllThatsEvil.net/

These days, a combination of Unix (AIX, HPUX, Solaris, Linux are primary choices, each with their own certifications) and windows MCSE, A+ certifications (7, XP, 2003/8) and mix in some DB experience along the way (oracle, mySQL, sybase, informix, SQL-Server) for good measure. A little Tomcat, WebSphere, Weblogic and IIS with methodologies ITIL, AGILE, SAP while you're at it maybe look into security training and CISSP certification will go a long way.

Your career is a journey, not a destination. You'll learn a lot along the way. Getting all the credentials early won't mean much, as there will be probably be many more needed later on. Gather what you need to get started, keep an eye on your goals and continue your education and certifications leading toward that goal. Don't let your employer dictate your course work - certifications and training is your personal responsibility - you take it with you to the next employer.

Keep an eye on the local job market. Participate in local business seminars and networking events, even after you're happily working, to watch the local trends, hear what other companies are doing, see what you may need to look into to keep your skills current and sharp. Keep in contact with people you've worked with and worked for. You never know when one of them may help you land that next position, or help mentor you, leading to a bigger / better role.

Douglas Pavey
Sr Unix Administrator
Dedicated, strategic, adept troubleshooter, mentor, counselor
Working to make the world better than I found it.